Kernel Panics Galore

Question

Hey Gang,
Just getting kernel panics galore (in fact, this is my second time writing this, because, guess what, kernel panic). And there doesn't seem to be any 'one' thing. I'm not very good at reading them, but here's the most recent:
Tue Apr 25 10:33:19 2006
Unresolved kernel trap(cpu 0): 0x300 - Data access DAR=0x000000000000000C PC=0x00000000007B7270
Latest crash info for cpu 0:
Exception state (sv=0x42DC4C80)
PC=0x007B7270; MSR=0x00009030; DAR=0x0000000C; DSISR=0x40000000; LR=0x007B7268; R1=0x2C843C30; XCP=0x0000000C (0x300 - Data access)
Backtrace:
0x007B7268 0x007B6A48 0x007B6720 0x007CB07C 0x002D0940 0x002CF808
0x000A9894
Kernel loadable modules in backtrace (with dependencies):
com.apple.iokit.AppleAirPort2(404.2)@0x78c000
dependency: com.apple.iokit.IONetworkingFamily(1.5.0)@0x65a000
dependency: com.apple.iokit.IOPCIFamily(1.7)@0x47c000
Proceeding back via exception chain:
Exception state (sv=0x42DC4C80)
previously dumped as "Latest" state. skipping...
Exception state (sv=0x00E34A00)
PC=0x00000000; MSR=0x0000D030; DAR=0x00000000; DSISR=0x00000000; LR=0x00000000; R1=0x00000000; XCP=0x00000000 (Unknown)
Kernel version:
Darwin Kernel Version 8.6.0: Tue Mar 7 16:58:48 PST 2006; root:xnu-792.6.70.obj~1/RELEASE_PPC
panic(cpu 0 caller 0xFFFF0003): 0x300 - Data access
Latest stack backtrace for cpu 0:
Backtrace:
0x00095718 0x00095C30 0x0002683C 0x000A8384 0x000ABD00
Proceeding back via exception chain:
Exception state (sv=0x42DC4C80)
PC=0x007B7270; MSR=0x00009030; DAR=0x0000000C; DSISR=0x40000000; LR=0x007B7268; R1=0x2C843C30; XCP=0x0000000C (0x300 - Data access)
Backtrace:
0x007B7268 0x007B6A48 0x007B6720 0x007CB07C 0x002D0940 0x002CF808
0x000A9894
Kernel loadable modules in backtrace (with dependencies):
com.apple.iokit.AppleAirPort2(404.2)@0x78c000
dependency: com.apple.iokit.IONetworkingFamily(1.5.0)@0x65a000
dependency: com.apple.iokit.IOPCIFamily(1.7)@0x47c000
Exception state (sv=0x00E34A00)
PC=0x00000000; MSR=0x0000D030; DAR=0x00000000; DSISR=0x00000000; LR=0x00000000; R1=0x00000000; XCP=0x00000000 (Unknown)
Kernel version:
Darwin Kernel Version 8.6.0: Tue Mar 7 16:58:48 PST 2006; root:xnu-792.6.70.obj~1/RELEASE_PPC
Most of them seem to be about the AirPort card. So I try shutting that off. Seems to work. Then it happens again and it blames the 'USB hub' (and since I have nothing plugged in, I can only assume that means internal). But it juts seems to change from point to point.
For example: it happens sometimes when I plug in, or if I adjust the screen's viewing angle, or if it's just sitting there. Sometimes it's after hours of use, but more often, when it happens a bunch in a row - it gives me about 1 minute of use (sometimes enough to shut the airport card off, othertimes, not even enough to click). Sometimes if I move it (sudden motion sensor?) even.
Today I had some new ones: I tried safe mode, but my timing was off; because my timing was off, it just took me to the login screen. When I tried to login: panic. Restart. Then it panicked during the gray screen apple spinner. Another retry and I hit shift during the startup chime; as soon as I did, the chime turned into static (and really loud too, so much I jumped).
About 50% of the time, I'll get the four beeps and the fans kick into high gear after I start after a panic. Of these, about 50% resolve after a shutdown; the other 50% require a PMU reset, otherwise it'll just keep on going on forever...
Another weird occurence: sometimes, after a restart postpanic, the mouse or keyboard is unresponsive (but the power button works - similiar to people who are having problems with the safe sleep function).
I used to be an Apple Consultant, and my instincts say - 'When bizarre, unexplainable, and 'unpinnable' stuff happens, it's generally RAM.' Which is also what I would think from the four beeps. But I've checked it out with both the Apple Hardware Test (found on my Install DVD) and TechTool Pro 4. While I don't trust TechTool (sorry, Micromat, but it's lied to me before), I've found the AHT to be great.
So, I'm stumped. I've gone through the Knowledgebase articles on both Memory and Kernel Panics (and PMU's for that matter), and I just don't seem to be getting anywhere.
If this is the wrong forum, I apologize.
Thanks in Advance for Any Help,
Ty
PowerBook 17" (Final Revision)   Mac OS X (10.4.6)   2GB

Answer 1

Sounds to me like a logic board issue, which is a shame because if it was just the AirPort causing these it's an easy fix. It's definitely hardware, that's for sure.
In my opinion, it's time to send it to Apple or an ASP.
Matt